Crotonaldehyde hydrogenation over clay-supported platinum catalysts

被引：41

作者：

Kun, I

Szöllösi, G

Bartók, M

机构：

[1] Hungarian Acad Sci, Organ Catalysis Res Grp, H-6720 Szeged, Hungary

[2] Univ Szeged, Dept Organ Chem, H-6720 Szeged, Hungary

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2001年 / 169卷 / 1-2期

基金：

匈牙利科学研究基金会; 美国国家科学基金会;

关键词：

hydrogenation; crotonaldehyde; crotyl alcohol; clay-supported platinum; Lewis acid sites; self-poisoning; deuterium distribution;

D O I：

10.1016/S1381-1169(00)00566-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two clay-supported platinum catalysts were prepared by impregnation and tested in the liquid phase hydrogenation of crotonaldehyde. Over both catalysts, the unsaturated alcohol selectivity was increased (to 49%) compared to that obtained over platinum on conventional supports (maximum 20%). The effect of the solvent, the subtrate initial concentration, the hydrogen pressure and the reaction time was studied. The benefic effect of the support was observed only if an alcohol was used as solvent. A deuterium tracer study revealed the coaction of the Lewis acid sites of the clay supports in adsorption of the substrate leading to an increase in the crotyl alcohol selectivity. The self poisoning of the metal over the clay-supported catalysts was supposed to inhibit the C=C group hydrogenation. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：235 / 246

页数：12

共 25 条

[1] Selective hydrogenation of aldehyde groups in various α,β-unsaturated aldehydes over alumina-supported cobalt (0) catalyst [J].